#include<stdio.h>

int main()
{
	int n= 1;
	int m =2;
	switch (n) {
	case 1:
		m++;
	case 2:
	    n++;
	case 3:
	    switch (n) {
		case 1:
		    n++;
		case 2:
			m++;n++;
			break;
		}
	case 4:
		m++;
		break;
	default:
		break;
	}
	printf("m=%d, n=%d\n", m, n);
	
	return 0;
}
